
Seats
Important safety notes
G
WARNING
The seats can still be adjusted when there is
no key in the ignition lock. For this reason,
children should never be left unsupervised in
the vehicle. They could otherwise become
trapped when adjusting the seat. G
WARNING
Make sure that the back of your head is
supported at eye level by the central area of
the head restraint. If your head is not
supported
correctly by the head restraint, you
could suffer a severe neck injury in the event
of an accident. Never drive if the head
restraints are not engaged and set correctly. G
WARNING
In order to avoid possible loss of vehicle
control, all seat, head restraint, steering
wheel and rear view mirror adjustments, as
well as fastening of seat belts, must be done
before setting the vehicle in motion. G
WARNING
Do not adjust the driver's seat while driving.
Adjusting the seat while driving could cause
the driver to lose control of the vehicle.
Never
travel in a moving vehicle with the seat
backrest in an excessively reclined position as
this can be dangerous. You could slide under
the seat belt in a collision. If you slide under
it, the seat belt would apply force at the
abdomen or neck. This could cause serious or
fatal injuries. The seat backrest and seat belts
provide the best restraint when the wearer is
in a position that is as upright as possible and
seat belts are properly positioned on the
body. G
WARNING
Your seat belt must be adjusted so that you
can correctly fasten your seat belt. Observe the following points:
R
adjust
the seat backrest until your arms are
slightly angled when holding the steering
wheel.
R adjust the seat to a comfortable seating
position that still allows you to reach the
accelerator/brake pedal safely. The
position should be as far back as possible
with the driver still able to operate the
controls properly.
R adjust the head restraint so that it is as
close to the head as possible and the center
of the head restraint supports the back of
the head at eye level.
R never place hands under the seat or near
any moving parts while a seat is being
adjusted.
Failure to do so could result in an accident
and/or serious personal injury. G
WARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats
than on the front-passenger seat. Thus,
we strongly recommend that children be
placed in the rear seat whenever possible.
Regardless of seating position, children 12
years old and under must be seated and
properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information, see the
"Children in the vehicle" section.
A child's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
! To avoid damage to the seats and the seat
heating, observe the following information:
R keep liquids from spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat Seats
107
Seats, steering wheel and mirrors Z

The AIRSCARF function warms the head and
neck
area of vehicle occupants with warm air.
The warm air flows out of the holes in the head
restraints.
The three red indicator lamps in the button
indicate the heating level you have selected.
X Make sure that the SmartKey is in
position 2 in the ignition lock.
X To switch on: press the : button.
Three
red indicator lamps in the button light
up. The blower starts up after a preheating
phase of seven seconds.
X Press button : repeatedly until the
desired heating level is set.
X To switch off: press button : repeatedly
until all the indicator lamps go out.
You can use the adjustable fins on the head
restraint
to adjust the height of the current of
air blown out according to your height.
Make sure that there are no objects covering
the intake grille on the back of the driver's
seat backrest.
i The blower continues running for seven
seconds to cool down the heating
elements.
i If the battery voltage is too low, the
AIRSCARF may switch off. Steering wheel
Important safety notes
G
WARNING
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving
could cause the driver to lose control of the
vehicle.
The electrical steering wheel adjustment
feature can be operated at any time.
Therefore, do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. A child's unsupervised access to a
vehicle could result in an accident and/or
serious personal injury. Adjusting the steering wheel
:
To adjust the steering wheel height
; To adjust the steering wheel position
(fore-and-aft adjustment)
i Further related subjects:
R EASY-ENTRY/EXIT feature
(Y page 114)
R Storing settings
(Y page 117) Steering wheel
113
Seats, steering wheel and mirrors Z

EASY-ENTRY/EXIT feature
Important safety notes G
WARNING
Make sure that nobody can become trapped
when you activate the EASY-ENTRY/EXIT
feature.
If there is a risk of someone becoming
trapped, stop the adjustment procedure. To
halt the procedure:
R press the steering column adjustment
button.
R press one of the memory function position
buttons.
The steering column stops moving
immediately.
Do not keep the memory function position
button pressed as this will start the memory
function and set the steering wheel and seat
in motion.
Do not leave children unattended in the
vehicle.
They could open the driver's door and
thereby unintentionally activate the EASY-
ENTRY/EXIT feature and become trapped. G
WARNING
Let the system complete the adjustment
procedure before setting the vehicle in
motion. All steering wheel adjustment must
be completed before setting the vehicle in
motion. Driving off with the steering wheel
still adjusting could cause the driver to lose
control of the vehicle.
The
EASY-ENTRY/EXIT feature makes getting
in and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board
computer (Y page 226). Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel swings upwards when
you:
R
remove
the SmartKey from the ignition lock
R open the driver's door and KEYLESS-GO is
in position 1
R open the driver's door and the SmartKey is
in position 0 or 1 in the ignition lock
i The steering wheel only moves upwards if
it has not already reached the upper end
stop.
Position of the steering wheel for
driving The steering wheel is moved to the last
selected position when:
R
the driver's door is closed.
R you insert the SmartKey into the ignition
lock.
or
R you press the Start/Stop button once on
vehicles with KEYLESS-GO.
When you close the driver's door with the
ignition switched on, the steering wheel is
also automatically moved to the previously
set position.
The last position of the steering wheel is
stored when you switch off the ignition or
when you store the setting with the memory
function ( Y page 117).
Crash-responsive EASY-EXIT feature If the crash-responsive EASY-EXIT feature is
triggered
in an accident, the steering column
will move upwards when the driver's door is
opened. This occurs irrespective of the
position of the SmartKey in the ignition lock.
This makes it easier to exit the vehicle and
rescue the occupants.
The crash-responsive EASY-EXIT feature is
only operational if the EASY-EXIT/ENTRY
feature is activated in the on-board computer. 114
Steering wheel
Seats, steering wheel and mirrors

Keep bulbs out of the reach of children.
Otherwise, they could, for example, damage
the bulbs and injure themselves.
Never use a bulb which has been dropped.
Such a bulb may explode and injure you.
Halogen bulbs are pressurized and could
explode when you change them, especially if
they are very hot. You should therefore wear
eye protection and gloves when you are
changing them.
There are bulbs other than the Xenon bulbs
that you cannot replace. Replace only the
bulbs
listed (Y page 130). Have the bulbs that
you cannot replace yourself changed at a
qualified specialist workshop.
If you require assistance changing bulbs,
consult a qualified specialist workshop.
Do not touch the glass tube of new bulbs with
your bare hands. Even minor contamination
can burn into the glass surface and reduce
the service life of the bulbs. Always use a lint-
free cloth or only touch the base of the bulb
when installing.
Only use bulbs of the correct type.
If the new bulb still does not light up, consult
a qualified specialist workshop.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly. Overview: changing bulbs/bulb types
You
can change the following bulbs. The bulb
type can be found in the legend. Halogen headlamps
:
Low-beam headlamp: H7 55 W
; High-beam headlamp: H7 55 W
= Parking lamp/standing lamp: W 5 W
? Turn signal lamp: 3457A Bi-Xenon headlamps
:
Cornering lamp: H7 55 W
Due to their location, have the bulbs in the
left-hand headlamp changed at a qualified
specialist workshop. 130
Replacing bulbs
Lights and windshield wipers

Starting procedure with the SmartKey
i
To start the engine using the SmartKey
instead of KEYLESS-GO, pull the Start/
Stop button out of the ignition lock.
X Turn the SmartKey in the ignition lock to
position 3 (Y page 151) and release it as
soon as the engine is running.
Using KEYLESS-GO to start the engine G
WARNING
As long as the SmartKey is in your vehicle, the
vehicle can be started. Therefore, never leave
children unattended in the vehicle, as they
could otherwise accidentally start the engine.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Do
not leave children unattended in the vehicle,
or with access to an unlocked vehicle. A
child's unsupervised access to a vehicle could
result in an accident and/or serious personal
injury.
i The Start/Stop button can be used to
start the vehicle without inserting the
SmartKey into the ignition lock. The Start/
Stop button must be inserted into the
ignition lock and the SmartKey must be in
the vehicle.
X Depress the brake pedal and keep it
depressed.
X Press the Start/Stop button ( Y page 151)
once.
The engine starts. Pulling away
Automatic transmission G
WARNING
If the engine speed is above the idling speed
and you engage transmission position D or
R,
the vehicle could pull away suddenly. There
is a risk of an accident. When engaging transmission position
D or R,
always
firmly depress the brake pedal and do
not simultaneously accelerate.
! If a warning tone sounds and the
Release Park. Brake message appears
in the multifunction display, the parking
brake is still applied. Release the parking
brake.
X Depress the brake pedal and keep it
depressed.
X Shift the transmission to position D or R.
X Release the parking brake ( Y page 168).
X Release the brake pedal.
X Carefully depress the accelerator pedal.
i It
is only possible to shift the transmission
from position P to the desired position if
you depress the brake pedal. Only then is
the selector lever lock released.
i The vehicle locks centrally once you have
pulled away. The locking knobs in the doors
drop down.
You can open the doors from the inside at
any time.
You can also deactivate the automatic
locking feature (Y page 225).
i Upshifts take place at higher engine
speeds after a cold start. This helps the
catalytic converter to reach its operating
temperature more quickly.
Hill start assist G
WARNING
After a short time, hill start assist will no
longer brake your vehicle and it could roll
away.
There is a risk of an accident and injury.
Therefore, quickly move your foot from the
brake pedal to the accelerator pedal. Never
leave the vehicle when it is held by hill start
assist.
Hill start assist helps you when pulling away
forwards or in reverse on an uphill gradient. Driving
153
Driving and parking Z

Problems with fuel and the fuel tank
Problem Possible causes/consequences and
M SolutionsFuel is leaking from the
vehicle.
G
Risk of explosion or fire
The fuel line or the fuel tank is faulty.
X Turn the SmartKey to position 0 in the ignition lock and remove
it immediately ( Y page 151).
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The fuel filler flap
cannot be opened. The fuel filler flap is not unlocked.
or
The SmartKey battery is discharged.
X
Unlock the vehicle (Y page 73).
or
X Unlock the vehicle using the mechanical key ( Y page 74).The fuel filler flap is unlocked, but the opening mechanism is
jammed.
X
Consult a qualified specialist workshop. Parking
Important safety notes
G
WARNING
If flammable materials such as leaves, grass
or
twigs are exposed to prolonged contact to
parts of the exhaust system that heat up, they
could ignite. There is a risk of fire.
Park the vehicle so that no flammable
materials come into contact with parts of the
vehicle which are hot. Take particular care not
to park on dry grassland or harvested grain
fields. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with
limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect. You will require considerably more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R releasing the parking brake
R shifting the automatic transmission out of
the parking position P
R starting the engine.
They could also operate the vehicle's
equipment.
There is a risk of an accident and
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
! A moving vehicle can lead to damage to
the vehicle or damage to the drive train. Parking
167
Driving and parking Z

To ensure that the vehicle is secured against
rolling away unintentionally:
R
the parking brake must be applied.
R the
transmission must be in position P and
the SmartKey must be removed from the
ignition lock.
R on uphill or downhill gradients, the front
wheels must be turned towards the curb. Switching off the engine
Vehicles with automatic transmission X
Apply the parking brake firmly.
X Shift the transmission to position P.
Using the SmartKey
X Turn the SmartKey to position 0 in the
ignition lock and remove it.
The immobilizer is activated.
i The
SmartKey can only be removed if the
transmission is in position P.
Using KEYLESS-GO
X Press the Start/Stop button (Y page
151).
The engine stops and all the indicator
lamps in the instrument cluster go out.
i When the driver's door is closed, this
corresponds
to SmartKey position 1. When
the driver's door is open, it corresponds to
SmartKey position 0 or "SmartKey
removed".
If you try to switch off the engine when the
transmission is not in position P, a message
appears in the multifunction display. A signal
sounds. Parking brake
G
WARNING
If you must brake the vehicle with the parking
brake, the braking distance is considerably
longer
and the wheels could lock. There is an
increased danger of skidding and accidents. Only use the parking brake to brake the
vehicle when the service brake is faulty. Do
not apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turning again.
G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R releasing the parking brake
R shifting the automatic transmission out of
the parking position P
R starting the engine.
They could also operate the vehicle's
equipment.
There is a risk of an accident and
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. If you brake the vehicle with the parking
brake, the brake lamps will not light up.
X
To apply:
depress parking brake ; firmly.
When the engine is running, the $ (USA
only) or J (Canada only) indicator lamp
lights up in the instrument cluster.
X To release: depress the brake pedal and
keep it depressed.
X Pull release handle :.
When the ignition is switched on or the
engine is running, the $ (USA only) or
J
(Canada only) indicator lamp goes out
in the instrument cluster. 168
Parking
Driving and parking

X
Press : or 9 to select the Auto.
Door Locks function.
When
the Automatic Door Lock function
is activated, the vehicle doors are displayed
in red in the multifunction display.
X Press the a button to save the setting.
If you activate the Automatic Door Lock
function,
the vehicle is centrally locked above
a speed of around 9 mph (15 km/h).
For further information on the automatic
locking feature, see ( Y page 80).
Activating/deactivating the acoustic
locking verification signal
If you switch on the Acoustic Lock function,
an acoustic signal sounds when you lock the
vehicle.
X Press the = or ; button on the
steering wheel to select the Sett. menu.
X Press : or 9 to select the Vehicle
submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Acoustic Lock function.
If the Acoustic Lock function is activated,
the & symbol in the multifunction
display lights up red.
X Press the a button to save the setting.
Activating/deactivating the radar sensor
system
X Press the = or ; button on the
steering wheel to select the Sett. menu.
X Press : or 9 to select the Vehicle
submenu.
X Press a to confirm.
X Press the 9 or : button to select
Radar Sensor (See Oper. Manual):.
You will see the selected setting: On or
Off.
X Press the a button to save the setting. The following systems are switched off when
the radar sensor system is deactivated:
R
DISTRONIC PLUS (Y page 177)
R BAS PLUS
(Y page 65)
R PRE-SAFE ®
Brake (Y page 67)
R Blind Spot Assist (Y page 200)
R Active Blind Spot Assist (Y page 204)
Convenience Activating/deactivating the EASY-
ENTRY/EXIT feature
G
WARNING
You must make sure no one can become
trapped or injured by the moving steering
wheel when the easy-entry/exit feature is
activated.
To stop steering wheel movement, move
steering
wheel adjustment lever or press one
of the memory position buttons.
Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Children could open the driver's door and
unintentionally activate the easy-entry/exit
feature, which could result in an accident
and/or serious personal injury.
X Press the = or ; button on the
steering wheel to select the Sett. menu.
X Press the :
or 9 button to select the
Convenience submenu.
X Press a to confirm.
X Press : or 9 to select the Easy
Entry/Exit: function.
If the Easy Entry/Exit function is
activated, the vehicle steering wheel is
displayed in red in the multifunction
display.
X Press the a button to save the setting.
Further information on the EASY-ENTRY/EXIT
feature ( Y page 114).226
Menus and submenus
On-board computer and displays